Add wide color setting.

android/README.md

@@ -4,6 +4,8 @@ arm64-v8a arch only.
 
 ## Requirements
 
+* Android 8.1(API 27) or later
+  * Android 12.0 or later recommended.
 * Android Studio 2022 Framingo or later
   * CMake(You can install cmake through Android Studio)
   * NDK r25 or later

android/app/src/main/AndroidManifest.xml

@@ -8,6 +8,8 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity android:name="android.colormode.WideColorModeActivity"
+                android:colorMode="wideColorGamut" />
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />